The Boston Celtics opened up the 2012-2013 season on Tuesday night against the hated Miami Heat. As usual things got a bit heated, but Doc Rivers says that it was totally legit. Rajon Rondo is known to have a bit of an attitude problem, and it's gotten him into trouble in the past.

Tuesday was no different as he was called for a flagrant foul on Dwyane Wade. It was a big foul, but Doc Rivers says it wasn't a 'punk play', it was a legitimate foul. Rivers went on to say that he also likes the 'fire' that Rondo has.

The Celtics open up at home on Friday night against the Milwaukee Bucks.